CN104278176A - Preparation method of high quality Al-5 Ti-1 B intermediate alloy - Google Patents
Preparation method of high quality Al-5 Ti-1 B intermediate alloy Download PDFInfo
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- CN104278176A CN104278176A CN201310275375.4A CN201310275375A CN104278176A CN 104278176 A CN104278176 A CN 104278176A CN 201310275375 A CN201310275375 A CN 201310275375A CN 104278176 A CN104278176 A CN 104278176A
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Abstract
The invention discloses a preparation method of a high quality Al-5 Ti-1 B intermediate alloy, and belongs to the technical field of aluminum based intermediate alloy preparation. The method adopts double-stage reaction melting technology, namely: a method of reaction of a K2TiF6, KBF4, Na3AlF6, CaF2 and MgF2 mixture and an Al melt is used to obtain a primary Al-5 Ti-1 B melt, then the melt is melted in an electric resistance furnace, the purpose of refining and adjustment of particle size and distribution of intermediate alloy Al3Ti can be achieved, the high quality Al-5 Ti-1 B intermediate alloy is prepared, and the high quality Al-5 Ti-1 B intermediate alloy prepared by the method is high in quality and good in modification effect on aluminum alloy, and can meet the demand of industry production.
Description
Technical field
The present invention relates to the preparing technical field of contained aluminium-base intermediate alloy, be specifically related to a kind of preparation method of high quality Al-5Ti-1B master alloy.
Background technology
Al-Ti-B alloy is industrial widely used aluminum grain refiner, very important to the quality and performance improving aluminium alloy.Along with the development of industrial technology, the requirement of Al-Ti-B alloy mass and rotten performance is improved day by day.Usually be easy to occur TiAl in alloy when producing Al-Ti-B alloy
3the problem that phase size is excessive or too small, alloy dregginess is higher, purity is lower.The production technology of development Al-Ti-1B master alloy, to improve the quality of Al-Ti-B master alloy, meets the demand of aluminium alloy production industry to high quality Al-Ti-B master alloy, has great importance.
Summary of the invention
The object of the present invention is to provide a kind of preparation method of high quality Al-5Ti-1B master alloy, meet industrial production demand.
Technical scheme of the present invention is:
A preparation method for high quality Al-5Ti-1B master alloy, the method adopts villiaumite mixture and molten aluminium to carry out chemical reaction and obtains Al-5Ti-1B master alloy; Wherein: the mass percent accounting for described molten aluminium according to component each in villiaumite mixture, described villiaumite mixture by 22 ~ 30% K
2tiF
6, 10 ~ 14% KBF
4, 3.5 ~ 4.1% Na
3alF
6, 0.015 ~ 0.035% CaF
2with 0.015 ~ 0.035% MgF
2composition;
The method specifically comprises the steps:
(1) preparation method of the high quality Al-5Ti-1B master alloy described in, first melts fine aluminium with medium-frequency induction furnace, obtains molten aluminium; Then melt is warming up to 775 ~ 825 DEG C; Described villiaumite mixture is all covered in aluminium melt surface, and at 775 ~ 825 DEG C of insulation reaction 30min(to obtain Al
3the intermediate alloy melt that Ti particle is tiny), obtain Al-5Ti-1B intermediate alloy melt and villiaumite.
(2) step (1) gained Al-5Ti-1B intermediate alloy melt and villiaumite are proceeded in resistance furnace, at 775 ~ 825 DEG C of standing insulation 20 ~ 40min, to adjust Al in Al-5Ti-1B intermediate alloy melt
3ti size of particles and distribution, and remove Slag inclusion, improve alloy melt purity.
(3) villiaumite on Al-5Ti-1B intermediate alloy melt surface is poured out, after alloy melt stirs, poured into metal pattern, obtain Al-5Ti-1B master alloy.
The present invention has following beneficial effect:
1, in the master alloy that prepared by the inventive method, Al
3the disperse of Ti size distribution, moderate dimensions, shape is block, good to the modification effect of aluminium and alloy.
2, low, the high purity of its dregginess of master alloy of preparing of the inventive method, can meet the demand of aluminium alloy production industry to high quality Al-Ti-B master alloy.
Accompanying drawing explanation
Fig. 1 is Al-5Ti-1B alloy structure pattern in embodiment 1; Wherein: figure (a): 50 μm, scale; Figure (b): 2 μm, scale.
Fig. 2 is Al-5Ti-1B alloy structure pattern in embodiment 2; Wherein: figure (a): 100 μm, scale; Figure (b): 2 μm, scale.
Fig. 3 is that stainless punching block is used in refinement experiment.
Fig. 4 is the grain structure of the postindustrial fine aluminium of Al-5Ti-1B alloy refinement process prepared through the present invention.
Fig. 5 is through the grain structure with the postindustrial fine aluminium of certain commercial Al-5Ti-1B alloy refinement process.
Embodiment
Below in conjunction with drawings and Examples in detail the present invention is described in detail.
Embodiment 1
1.3 kilograms of fine aluminiums are melted in inductive crucible and is heated to 810 DEG C, by 312 grams of K
2tiF
6, 145 grams of KBF
4, 48.4 grams of Na
3alF
6, 0.3 gram of CaF
2with 0.3 gram of MgF
2aluminium melt surface is covered in after powder (granularity 160 order-300 order) mixes, 27min is incubated at 810 DEG C, above-mentioned alloy melt and villiaumite are proceeded to inherent 810 DEG C of resistance furnace and leave standstill insulation 26min, alloy melt surface villiaumite is poured out, after alloy melt stirs, poured into metal pattern, formed intermediate alloy ingot.
Fig. 1 is Al-5Ti-1B alloy structure pattern.Analysis shows, TiAl in the Al-5Ti-1B alloy that the present embodiment is developed
3particle size is between 4.0 ~ 81.3, and mean sizes is 20.4 μm, TiB
2particle size is between 0.16 ~ 0.50 μm, and mean sizes is 0.33 μm, and in alloy, Slag inclusion content is very low.
Embodiment 2
1.3 kilograms of fine aluminiums are melted in inductive crucible and is heated to 800 DEG C, by 338 grams of K
2tiF
6, 156 grams of KBF
4, 49.4 grams of Na
3alF
6, 0.3 gram of CaF
2with 0.3 gram of MgF
2aluminium melt surface is covered in after powder (granularity 160 order-300 order) mixes, 30min is incubated at 800 DEG C, above-mentioned alloy melt and villiaumite are proceeded to inherent 800 DEG C of resistance furnace and leave standstill insulation 30min, alloy melt surface villiaumite is poured out, after alloy melt stirs, poured into metal pattern, formed intermediate alloy ingot.
Fig. 2 is Al-5Ti-1B alloy structure pattern.Analysis shows, TiAl in the Al-5Ti-1B alloy that the present embodiment is developed
3particle size is between 4.08 ~ 81.8, and mean sizes is 20.7 μm, TiB
2particle size is between 0.18 ~ 0.51 μm, and mean sizes is 0.34 μm, and in alloy, Slag inclusion content is very low.
Embodiment 3
The Al-5Ti-1B master alloy adopting embodiment 2 to prepare carries out thinning processing to fine aluminium, and process is as follows:
Grain refining test materials is commercial-purity aluminium.Testing installation is well formula resistance furnace and corundum crucible.Fine aluminium is placed in heat fused in crucible, refining after molten aluminium rises to 710 DEG C ~ 730 DEG C, stir and skim, add the Al-5Ti-1B alloy material that massfraction is 0.4%, add rear stirring about 30s, then be incubated, after insulation different time, be cast in stainless punching block, stainless punching block shape as shown in Figure 3.After solidifying, sample is cut from apart from 20mm bottom punching block, through grinding, polishing and with 0.5% HF corrode after observe sample macrograin tissue, and measure the mean diameter of crystal grain.
Fig. 4 is the grain structure through the postindustrial fine aluminium of embodiment 3 thinning processing, and analysis shows, the grain-size after refinement is nearly all below 50 μm.Fig. 5 is that analysis shows through the grain structure with the postindustrial fine aluminium of certain commercial Al-5Ti-1B alloy refinement process, and after refinement, grain-size is greatly between 100-150 μm.Visible, Al-5Ti-1B alloy prepared by the art of this patent has very strong Grain Refinement Effect.
Claims (2)
1. twin-stage reaction-smelting preparation method of high quality Al-5Ti-1B master alloy, is characterized in that: the method adopts villiaumite mixture and molten aluminium to carry out chemical reaction and obtains Al-5Ti-1B master alloy; Wherein: the mass percent accounting for described molten aluminium according to component each in villiaumite mixture, described villiaumite mixture by 22 ~ 30% K
2tiF
6, 10 ~ 14% KBF
4, 3.5 ~ 4.1% Na
3alF
6, 0.015 ~ 0.035% CaF
2with 0.015 ~ 0.035% MgF
2composition;
2. the preparation method of Al-5Ti-1B master alloy according to claim 1, is characterized in that: the method specifically comprises the steps:
(1) preparation method of the high quality Al-5Ti-1B master alloy described in, first with medium-frequency induction furnace, fine aluminium is melted, obtain molten aluminium, then 775 ~ 825 DEG C are warming up to, described villiaumite mixture is all covered in aluminium melt surface, and at 775 ~ 825 DEG C insulation reaction 30min, obtain Al-5Ti-1B intermediate alloy melt and villiaumite;
(2) step (1) gained Al-5Ti-1B intermediate alloy melt and villiaumite are proceeded in resistance furnace, at 775 ~ 825 DEG C of standing insulation 20 ~ 40min;
(3) villiaumite on Al-5Ti-1B intermediate alloy melt surface is poured out, after Al-5Ti-1B intermediate alloy melt is stirred, and poured into metal pattern, obtain Al-5Ti-1B master alloy.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104831096A (en) * | 2015-04-09 | 2015-08-12 | 昌吉市吉日光有色金属合金制造有限公司 | Aluminium titanic boron intermediate alloy refinement agent and preparation technology thereof |
| CN105039796A (en) * | 2015-09-10 | 2015-11-11 | 成都锦钛精工科技有限公司 | Aluminum-tellurium intermediate alloy and preparing method and application thereof |
| CN107034374A (en) * | 2017-04-17 | 2017-08-11 | 中国科学院金属研究所 | A kind of method that villiaumite reaction method prepares Al 5Ti 1B intermediate alloys |
| CN106435232B (en) * | 2016-10-13 | 2018-04-13 | 昆明冶金研究院 | A kind of preparation method of aluminum-titanium-boron alloy of control TiAl3 particle sizes and distribution of particles |
| CN109355520A (en) * | 2018-11-27 | 2019-02-19 | 中国科学院金属研究所 | A kind of Al-Ti-C-B intermediate alloy and preparation method thereof |
| CN109371262A (en) * | 2018-12-14 | 2019-02-22 | 中南大学 | A method of utilizing titanium elements in molten aluminum recycling titanium alloy scrap |
| CN112609094A (en) * | 2020-11-30 | 2021-04-06 | 中国科学院金属研究所 | Preparation method of aluminum alloy with efficiently refined grains |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104831096A (en) * | 2015-04-09 | 2015-08-12 | 昌吉市吉日光有色金属合金制造有限公司 | Aluminium titanic boron intermediate alloy refinement agent and preparation technology thereof |
| CN105039796A (en) * | 2015-09-10 | 2015-11-11 | 成都锦钛精工科技有限公司 | Aluminum-tellurium intermediate alloy and preparing method and application thereof |
| CN106435232B (en) * | 2016-10-13 | 2018-04-13 | 昆明冶金研究院 | A kind of preparation method of aluminum-titanium-boron alloy of control TiAl3 particle sizes and distribution of particles |
| CN107034374A (en) * | 2017-04-17 | 2017-08-11 | 中国科学院金属研究所 | A kind of method that villiaumite reaction method prepares Al 5Ti 1B intermediate alloys |
| CN107034374B (en) * | 2017-04-17 | 2018-12-07 | 中国科学院金属研究所 | A kind of method that villiaumite reaction method prepares Al-5Ti-1B intermediate alloy |
| CN109355520A (en) * | 2018-11-27 | 2019-02-19 | 中国科学院金属研究所 | A kind of Al-Ti-C-B intermediate alloy and preparation method thereof |
| CN109355520B (en) * | 2018-11-27 | 2020-10-09 | 中国科学院金属研究所 | Al-Ti-C-B intermediate alloy and preparation method thereof |
| CN109371262A (en) * | 2018-12-14 | 2019-02-22 | 中南大学 | A method of utilizing titanium elements in molten aluminum recycling titanium alloy scrap |
| CN112609094A (en) * | 2020-11-30 | 2021-04-06 | 中国科学院金属研究所 | Preparation method of aluminum alloy with efficiently refined grains |
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